[Boost-users] MS VC++ wchar_t type build Q

[Scott Morgan]

Is there an option to build the Boost libs with or without the wchar_t
treated as built in (that whole /Zc:wchar_t mess MS dropped on us)

Scott

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[Adam Merz]

Scott Morgan <blumf <at> blueyonder.co.uk> writes:
> Is there an option to build the Boost libs with or without the wchar_t
> treated as built in (that whole /Zc:wchar_t mess MS dropped on us)

How is being standards conformant 'a mess'?

Anyway, /Zc:wchar_t is passed to the compiler by default, and there is no
built-in option you can pass to bjam to control this behavior. However, what you
can do is, before building Boost, edit your tools/build/v2/tools/msvc.jam file
and remove '/Zc:wchar_t' from line 532. (Be sure to leave a space in front of
the line's terminating semicolon.) Then, to explicitly enable or disable the
option, you can pass either cxxflags="-Zc:wchar_t" or cxxflags="-Zc:wchar_t-" to
bjam.

[Scott Morgan]

Adam Merz wrote:
> Scott Morgan <blumf <at> blueyonder.co.uk> writes:
>
>> Is there an option to build the Boost libs with or without the wchar_t
>> treated as built in (that whole /Zc:wchar_t mess MS dropped on us)
>>
>
> How is being standards conformant 'a mess'?
>

When it's not default and half the libs you use have it and half don't.

> Anyway, /Zc:wchar_t is passed to the compiler by default, and there is no
> built-in option you can pass to bjam to control this behavior. However, what you
> can do is, before building Boost, edit your tools/build/v2/tools/msvc.jam file
> and remove '/Zc:wchar_t' from line 532. (Be sure to leave a space in front of
> the line's terminating semicolon.) Then, to explicitly enable or disable the
> option, you can pass either cxxflags="-Zc:wchar_t" or cxxflags="-Zc:wchar_t-" to
> bjam.

Thanks.

Scott

[Adam Merz]

Scott Morgan <blumf <at> blueyonder.co.uk> writes:
>
> Adam Merz wrote:
> > Scott Morgan <blumf <at> blueyonder.co.uk> writes:
> >
> >> Is there an option to build the Boost libs with or without the wchar_t
> >> treated as built in (that whole /Zc:wchar_t mess MS dropped on us)
> >>
> >
> > How is being standards conformant 'a mess'?
> >
>
> When it's not default and half the libs you use have it and half don't.

FWIW, /Zc:wchar_t is the default in VC8 and VC9; if you're referring to VC7 or
VC7.1, I certainly agree with you.

Also, it's worth noting that the line number I referenced was for 1.36's
msvc.jam.